Help with "doveadm" - Socket ?

[White, Daniel E. (GSFC-770.0)[NICS]]

doveadm [-f formatter] mailbox status [-A|-u user] [-S socket_path] [-t] fields 
mailbox ...

Where do I find this "socket_path", please ?

I am trying to untangle a very old CentOS 6 instance.

Thanks in advance.